AUSTRALIAN" MALACOSTBACA. 21 



33. Naxia serpulifer. A.M. 



Pisa serpulifer, G-uerin, Icon. Crust, p. viii., fig. 2. 



Naxia serpulifer, Milne-Edwards, Hist. Nat. Crust., t. i., p. 313. 



Carapace tuberculated above, rounded behind, much contracted 

 in front. Rostrum large, and formed of two cylindrical cornua, 

 truncate at the apex and each terminating in two strong spiniforin 

 teeth. Anterior angle of the superior orbital border occupied 

 by a thick triangular tooth, a similar tooth on the pterygostomial 

 and branchial regions. First pair of legs in the male as long 

 and stouter than the second ; second pair nearly once and a half 

 the length of the following pairs ; in the female the first pair 

 much shorter than the second, and the latter scarcely longer than 

 the following pairs. [M.-E.] 



Port Essington (Macleay Museum) ; Thursday Island, Torres 

 Straits. (AV'.A.H., H.M.S. "Alert" 



Sub- Fa m ilj/ Sch izoplt n/since. 



Carapace very broadly triangular, or oval, or nearly circular. 

 Rostrum very short or obsolete. Anterior legs in the male small, 

 slender : the fingers usually excavated at the tips. \_M.~\ 



G-enus Ciclomaia, Stimpson. 



Carapace orbiculate or oblong-orbiculate, spines of rostrum 

 simple, rudimentary. Orbits large. Basal joint of antenna 1 

 very broad, with three spines at its distal end. Anterior legs 

 with the fingers excavated at the tips. 



31. Cyclomaia margaritata. A.M. 



Ci/clomaia margaritata, A. Milne-Edwards, Nouv. Arch, du 

 Mus., t. viii., p. 230, pi. x, figs. 2 and 3 (1S72). 



Carapace orbicular, as broad as long, regularly convex, covered 

 with regularly disposed tubercles. Front broad, little prominent, 

 formed of two median short and obtuse points, and of the 

 internal orbital angles. Orbits deep, their upper border with 

 two fissures. Lateral borders armed with six short, thick, 

 granular teeth (including the external orbital angle), the second 

 bifid. Basal joint of the antenna? armed with three short spines. 

 Anterior limbs dilated, the hand smooth, the fingers arched ; arm 



